I have the same awful taste with tawa. Janty atty doesn't give that taste even it's left dry. I found that after that tawa has to be cleaned and keep wet all the time.
I'm dripin' and I modified the mouthpiece in the way I cut down 3-4mm from the end near the heating element and additionally cut out a piece from flat side to avoid touching it.
Can't edit!
Both attys has 2.5 ohm resistance!